Quick answer
This is a FIRE calculator with multiple accounts: it models your 401(k), IRA, and taxable balances separately, then simulates tax-aware withdrawal sequencing across them year by year. Use it when the question is no longer "how much do I need?" but "which account do I draw first, and what does that order cost or save?" — a decision that routinely moves five figures of lifetime taxes on an ordinary early-retirement plan.
How to use this calculator
1. Enter account balances and spending needs
Enter each balance where it actually lives — for example $600,000 taxable, $700,000 traditional 401(k)/IRA, and $200,000 Roth against a $60,000 annual spending target. The split matters as much as the $1,500,000 total: each account type carries different tax treatment and different access rules, which is exactly what a single-pool calculator cannot see.
2. Configure early-access and sequencing rules
Set your retirement age; the model then funds spending in a fixed order — taxable first before 59½ with Roth as backup, and capped 401(k) first afterward with Roth preserved for last. Before 59½, traditional-account withdrawals generally face a 10% early-distribution penalty on top of income tax (with exceptions such as SEPP/72(t) arrangements and the Roth-conversion ladder, which needs a five-year runway per conversion). Taxable holdings and Roth contribution basis are the standard bridge for early years.
3. Compare at least three strategy variants
Run taxable-first, proportional, and conversion-ladder variants against the same spending target. Keep everything else fixed so the strategy is the only difference.
4. Evaluate durability, not just year-one tax
A sequence that looks clever in year one can strand a large traditional balance that later forces high-bracket required minimum distributions (RMDs currently begin at age 73–75 depending on birth year). Judge strategies over the full projection.
Modeling 401(k), IRA, and taxable accounts separately
Single-pool FIRE math treats $1,500,000 as $1,500,000. Account-level modeling knows better:
- *Taxable money spends at capital-gains rates — and only the gain* is taxed. Selling $60,000 of holdings with a 50% basis realizes $30,000 of gains, which for a married couple with no other ordinary income can fall entirely inside the 0% long-term capital gains bracket.
- *Traditional* money spends at ordinary income rates, but the first dollars each year fall into the standard deduction and low brackets. A $30,000 traditional withdrawal for that couple might average well under 10% effective federal tax.
- *Roth* money spends tax-free and has no RMDs — which is precisely why draining it first is usually backwards: it is the most valuable account to let compound and the best shock absorber for lumpy expenses later.
The practical consequence for the example household: funding $60,000 of spending from taxable sales plus a modest traditional withdrawal can produce an effective tax rate near zero in early retirement — while leaving room to convert traditional dollars to Roth inside the unused low brackets. The same spending funded traditional-first from age 60 could face several times the tax. Order is a real lever, and this page exists to measure it against your numbers rather than a rule of thumb.
Withdrawal sequencing across account types
The classic default — taxable first, traditional second, Roth last — is a decent starting point because it preserves tax-advantaged compounding and low-bracket space. The interesting cases are where the default loses:
- A large traditional balance and a long runway to RMD age argue for early conversions or earlier traditional withdrawals to spread income across more low-tax years.
- Heavy unrealized gains with charitable intent or a step-up consideration argue for spending traditional sooner and gifting appreciated taxable shares.
- ACA premium subsidies (for pre-Medicare early retirees) put a price on every dollar of reported income, which can flip the ranking of otherwise-similar strategies.
Run your variants; the calculator scores them on ending balances and plan durability instead of asking you to trust a heuristic.
High-impact assumptions
Sequencing, conversion pacing, and the spending target dominate this model's spread between strategies.
Withdrawal target realism
Every strategy comparison inherits the spending input. At $60,000 the example household coasts through low brackets; at $110,000 the same accounts push into materially higher rates and the strategy gap widens. Stress the target before trusting the ranking.
Sequence policy across account types
Test the three variants above at minimum. On multi-decade horizons, differences of even 0.5% in average tax drag compound the way fees do: roughly a 15% difference in ending wealth over 30 years.
Conversion pacing and tax bracket usage
Roth conversions trade tax now for flexibility later. Filling only the space left inside a low bracket each year — rather than converting a fixed amount — keeps the trade favorable and shrinks future RMDs.
Liquidity for near-term shocks
A strategy that is tax-optimal but leaves under a year of accessible spending outside penalty-gated accounts fails the first real-world surprise. Keep the bridge funded first; see the Emergency Fund Calculator for sizing.
Return stress and downside timing
Sequence-of-returns risk hits withdrawal plans hardest in the first decade. Rerun your preferred strategy at a conservative return before committing to it, then open the *Market simulation* tab to see how the same plan holds up when returns arrive unevenly.
Stress-testing with the market simulation
The straight-line projection assumes your growth rate arrives every single year. Real portfolios do not behave that way, and for a plan that is drawing money out, the order of good and bad years matters as much as the average. A 20% drop in the first year of retirement forces you to sell more shares at low prices to fund the same spending, and those shares are not there to recover later. The same drop twenty years in does far less damage.
The *Market simulation* tab runs your exact plan, with the same accounts, contributions, tax rate, withdrawal order, and penalty rules, through 1,000 different sequences of yearly returns. Each sequence keeps your growth inputs as its middle case and adds realistic swings around them, set by the return volatility input. The default of 15% suits a stock-heavy portfolio; a 60/40 mix is closer to 11%.
The headline is how many of those scenarios met every year's withdrawal target through your life expectancy. Read it as a sturdiness score, not a forecast. A plan that stays funded in about 90 of 100 scenarios is meaningfully more robust than one that only survives 60, and that difference is invisible in a single projected line. The band chart shows the spread: the darker band holds the middle half of outcomes, the lighter band holds 80%, and the dashed line is the straight-line projection for comparison.
Three details are worth knowing before you act on the number. First, each scenario withdraws your chosen percentage of its own balance at retirement, so a scenario that had a strong run-up also spends more. Second, running short means one year's target could not be met in full, not that the money vanished overnight; most real retirees trim spending well before that point. Third, the return model understates how often severe crashes happen and how bear markets cluster, so treat a borderline result as a reason to add margin rather than as a precise probability.
The simulation is seeded, so the same inputs always produce the same result and a share link reproduces exactly what you saw. Useful levers to test: lower the withdrawal rate by half a point, retire two years later, or raise volatility to 18% to approximate an all-stock portfolio in a rough decade.
Common mistakes to avoid
1. Optimizing one tax year in isolation
Minimizing this year's bill by draining low-bracket space every year often maximizes lifetime tax once RMDs arrive.
2. Treating penalties and access rules as edge cases
The 59½ rule, the five-year clocks on conversions, and RMD ages are load-bearing constraints for early retirees, not footnotes.
3. Changing too many levers at once
If a run changes sequence, conversion pace, and spending at once, you cannot attribute the outcome. One lever per comparison.
4. Ignoring implementation practicality
A 14-step optimal plan you will not execute loses to a 3-step good plan you will. Prefer strategies robust to being run imperfectly.
5. Skipping periodic revalidation
Tax brackets, contribution limits, and RMD ages change with legislation. Revisit the plan annually and after major life events.
Practical comparison framework
Baseline strategy
Taxable first, traditional second, Roth last, no conversions. This is the reference case every alternative must beat.
Tax-minimization strategy
Add annual Roth conversions that fill remaining low-bracket space during the bridge years. Watch both lifetime tax and the ending Roth share.
Flexibility-first strategy
Hold a larger accessible reserve and accept slightly higher expected tax. Score it on how the plan survives a bad first decade, not on the average case.
When to use other calculators with this route
Establish the target and timeline with the FIRE calculator first, and check whether compounding alone can finish the accumulation job with the Coast FIRE calculator. This page then answers the withdrawal-phase question those single-pool tools deliberately leave out. The methodology page documents the tax approximations and their limits.
Frequently asked questions
When should I use this page instead of the basic FIRE calculator?
The moment account location becomes a real decision — typically when you hold meaningful balances in at least two of the three account types, or when retirement starts before 59½ and a bridge period exists.
What does the market simulation success rate mean?
It is the share of 1,000 simulated return sequences in which every year's withdrawal target was met in full through your life expectancy. It measures how sturdy the plan is across good and bad markets; it is not a guarantee or a personal probability.
Is one withdrawal order always best?
No. Taxable-first wins often enough to be the default, but large traditional balances, subsidy cliffs, and charitable plans all create documented exceptions. That is why this tool compares orders instead of prescribing one.
Does this calculator file my taxes or give tax advice?
No — it applies simplified federal bracket math to compare strategies directionally. Confirm any plan with a qualified tax professional before acting.
How do Roth conversion ladders fit in?
Each conversion becomes penalty-accessible after five tax years, so ladders need to start about five years before the money is needed. The tool lets you pace conversions annually to model exactly that runway.
What should I do after this page?
Pressure-test the winning strategy at a conservative return, confirm the bridge liquidity, and document the annual decision rule you will actually follow. Then rerun yearly.
Educational use note
This content is educational and scenario-based. It is not financial, legal, or tax advice. Use conservative assumptions, compare multiple scenarios, and consult qualified professionals before making irreversible decisions.